Refrigerator



May 22, 1928.

C. G. MUNTERS REFRIGERATOR Filed Nov. 27, 1926 INV NTOR MM J. h; ATTORNEY nor, and which contains a solution of cool- (BABE,

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Application. filed Hovemhsr 53?, rear, serial lifohwlfitth and in awedeu tan a,

This invention relates to refrigeration and, in one phase, to refrigeratingapparatus wherein a plurality of eva orators are connected to a single source refrigerant suppl in one phase, the invention relates speci cally to refrigerating apparatus of the absorption type.

The invention will be apparent from the accompanying drawing showin one embodimentof my invention. In tie drawing: Fig 1 shows a refri crating system embodying the invention; a ig. 2 shows a detail of a portion of Fig. l; and Fig. 3 shows an ice mold for use in the system of Fig. l.

in the drawing, designates a generator which may be heated in any desired maning agent absorption liquid. As one example, some 18 designated as the cooimo' a cut and water as the absorption h in apor is produced in generator 10 and owe into conduit 12. The vapor is separated into a plurality of streams at 13 and enters a plurality of condensers it, 15.' The corn densers are cooled in any desired manner as by cooling water in tanlr l6. Condenser 15 is connected by means of conduit 17 with an. evaporator 18. Condenser lt is connected with an evaporator by means of a conduit 19. There is a. separate condenser for each of the plurality of evaporators. The separation of the ammonia into several streams is efiected be fore the ammonia enters the evaporator thus ensuring a proper separation, The separation of iquid into several stres. cannot be as efiective as separation of gas particularly in case of slow fluid velocity.

Hydrogen gas (as a suitable auxiliary gas to cooperate with cilia;l is supplied to evaporators 18 and 20 throng conduit 21.

In the evaporators the ammonia difiuses into the hydrogen and refrigeration is produced. Evaporator 20contains a series of trays 23 for obtaining a large surface of liquid for gas contact. Evaporator-18 consists of a continuous coil which is wound aroundso as to permit the insertion of ice molds 24.- between portions thereof. The coil is made of convolutions' so arranged that there is a continuous flow forges and liquiddownwardly therethrough.

In each of the evaporators there is formed cross section.

a mixture ofhydrogen and some which passes to the lower part of absorber 25 as through conduits 26 and 27. In the ab-= sorber 25 the ammonia is absorbed and hy-' drogen liberated, the hydrogen passing back through'conduit 21 to again mix with amonia. Weak liquid passes from the lower as part of the generator through conduit 28 and into the upper part of the absorber. Strong absorption liquid passes through conduit 29 and through auxiliarygenerator 30 and thence through conduit 31 into the as upper part of the generator. Conduits 28 and 29 are arranged in heat exchange relation to transfer heat from the liquid in conduit 28 to the liquid in conduit 29. Auxilgenerator 30 lifts the liquid in the abto sorher to the higher level in the generator. The absorber is also supplied with a series of trays 23 to provide a large surface of gas and liquid contact. The circulation through the evaporator-s and absorber takes place due to to difierences in gravity within the vertically extending conduits and paths of the system.

The evaporator 18 is preierably'equipped with a spiral wire 33 which causes formats tion of a series oi pools 34. This aids the evaporation. Where portions of the coil are substantially horizontal and portions of considerable slope, this wire should be placed in the sloping portions. The evapoas rator may be made oi a pipe continuously sloping so that the wire may be used throughout its length.

lee molds 2a are supported upon one irops 36 which are welded to the loops oft coi Fig. 3 shows an ice inserted between the convolutions of evaporator coil 18. The ice mold is formed with an inner corrugated member ilwhich is or adapted to form ice pieces of triangular Member 41' is made of a single strip of metal and permits removal of the ice pieces without running water over the ice mold- A simple twist of member 41 we serves to unloosen the ice pieces.

- The ability of ammonia to difiuse into hydrogen increases with increase of temperature of the hydrogen. In other Words, at

a high temperature, hydrogen gas has a that greater capacity for absoribng gaseous am I Gilli inold adapted to be monia. Due to this relation, a unique automatic balance is obtained in respective evaporative effects of the above described apparatus. Assume that little or no heat is being taken up in evaporator 18. The temperature reduces to a point where very little diffusion takes place. This evaporator then automatically puts itself out of function or materially decreases its activity due to the internal characteristics of the fluids of the system. Likewise evaporator 20 ceases to function or decreases its activity when it becomes very cold due to the inability of ammonia to diffuse into hydrogen at low temperatures. While either evaporatoris temporarily inefl'ective the other evaporator maybe in full operative condition. Thus, due to the pressure equalizing medium a complete automatic balance is obtained and together with the separationof the refrigerants prior to entry-into'the condensers, a complete system of high efliciency is obtained for use where independent refrigerative effects are desired.

- While I have illustrated my invention in connection with the type of apparatus shown in Patent No. 1,609,334 granted December 7, 1926, to Baltzar Carl von Platen and myself jointly, to which patent further referonce may be had as to phases of the specific type of apparatus illustrated, it will readily be understood that other structures may be used for carrying out the invention.

Having thus described my invention, .what I claim is;

1. Refrigerating apparatus comprising, in combination, a generator, a conduit for conducting vapor rom said generator, a plurality of condense each connected to said conduit and a plur ity of evaporators connected to the condensers.

2. Refrigerating apparatus comprising a plurality of evaporators, a plurality of condensers, one for each evaporator, and a gen- 'erator arranged to supply vapor to said condensers in parallel.

3. Refrigerating apparatus comprising a generator, an absorber, a plurality of con densers, a plurality of evaporators and connections for circulating a cooling a cut through the absorber and generator an .in parallel through the condensers and evaporators, for circulating an auxiliary agent through the absorber and in parallel through the evaporators and for circulating. absor tion liquid through the generator and a sorber.

4. Refrigerating apparatus comprising a plurality of eva orators, a plurality of condensers each independently connected-to a separate evaporator. in open unobstructed communication to permit-the same pressure tourist in the respective condensers and evaporators, a single enera'tor arranged to supply vapor of-a-"coo ing agent to the plugenerator, the apparatus comprising an auxiliary agent for permitting the said same pressure to exist.

5. Refrigerating apparatus comprising a plurality of evaporators, a plurality of condensers each independentlyconnected to a separate evaporator in open unobstructed communication to permit the same pressure to exist in the respective condensers and evaporators, a single generator containing a cooling agent dissolved in an absorption liquid, means to conduct vapor from said generator to said plurality of condensers,-an absorber, means to circulate absorption liq uid between the generator and absorber and means to circulate an auxiliary gasbetween the absorber-and evaporators. i

6. Refrigerating apparatus comprising a lurality of eva orators, a plurality of condensers each in ependently connected to a separate evaporator in 0 en unobstructed communication to permit t e same pressure to exist in the respective condensers and evaporators, said condensers being situated above the respective evaporators to which they are connected, a single generator situated below said condensers and arranged to supply vapor of a cooling agent to the plurality of condensers and circulation means to convey cooling agent from'the evaporator to the generator, said circulation means open ating to transport an auxiliary agent contained in the apparatus for permitting the said same pressureto exist.

7. That improvement in the artof reirigeration by the aid of asystem includin a generator, condensing means, an absor r and a plurality of evaporators which consists in diifusmg a cooling agent into an auxiliary agent in each of the evaporators such that the rate of diffusion bears arela-- tion to the temperature of the auxiliary agent.

8. That improvement in the. art of refrigeration by the aid of a system including a'generator, condensing means, an absorber and a plurality of evaporators which consists in introducing liquid cooling a nt into each of the evaporators and 0113011 ating a gaseous auxiliary agent though each of the memes I 3 the condensers; conducting liquid cooling nature that as its temperature is increased agent from individual condensers to individless cooling agent is capable of difiusing into ual evaporators, circulating absorption liqe, unitby weight thereof. 10 nid between the generator and the absorber In testimony whereof I have efixed my 5 and circulating an auxiliary agent throu%) signature.

each of the evaporators and through the a sorber, the auxiliary agent being of such 'CARLGEORG MUNTERS. 

